added base Entity and deleted obsolete entities CRM-14241

----------------------------------------
* CRM-14241: setup new repo for doctrine integration work
  http://issues.civicrm.org/jira/browse/CRM-14241
fixes to entities, CRM-14241

----------------------------------------
* CRM-14241: setup new repo for doctrine integration work
  http://issues.civicrm.org/jira/browse/CRM-14241
fixes to entities, CRM-14241

----------------------------------------
* CRM-14241: setup new repo for doctrine integration work
  http://issues.civicrm.org/jira/browse/CRM-14241
Merge pull request #2574 from kurund/CRM-14241

CRM-14241, more fixes